JP2000356196A - Pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To raise the level of priming to increase the water quantity with an inexpensive structure by inserting a synthetic resin self-priming pipe of another part from a discharge opening within a synthetic resin self-priming case, and arranging it in a regulated position. SOLUTION: A self-priming case 11 having a gas-water separation chamber 11a fixed to the upper part of a casing is made of synthetic resin, and it comprises a passage 11b for connecting a check valve chamber 4 to a suction port and an opening 11c connected to a discharge port. A synthetic resin self- priming pipe 12 is inserted through the discharge opening 11d of the self-priming case 11, and arranged in a regulated position by inserting it while butting a projection provided on the self-priming case discharge opening 11d to the flange cutout part of the self-priming pipe 12. The self-priming pipe 12 is made into such an insertion type, whereby the level shown by the line Y-Y can be raised by the portion of an arrow U1, compared with the case where the opening height of the self-priming pipe shown by the line X-X which is limited in the drawing direction on the metal mold structure because it is made of synthetic resin, and the priming quantity can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home well pump device.

[0002]

2. Description of the Related Art A conventional self-priming case, a suction pipe and a discharge pipe are made of cast iron, and the conventional self-priming case shown in FIG. Since it is made of cast iron, the core can be used on the mold, the height position of the self-priming pipe opening can be the ZZ position, and the required amount of priming water can be stored.

However, this time, since the material is made of synthetic resin, when the self-priming tube is integrated as shown in FIG. 10, the structure of the mold becomes complicated, and the height position of the opening of the self-priming tube is limited due to the restriction of the drawing direction. XX, the priming water cannot be sufficiently stored, and a decrease in the amount of priming water causes a decrease in performance such as a longer self-priming time.

The water outlet seal structure at the lower part of the discharge pipe shown in FIG. 8 has a structure in which an opening of the lower end of the discharge pipe and a lid are inserted with an O-ring for water sealing and the lid is fixed with a normal screw. Problems such as an increase in the number of points and an increase in assembly time occur. Further, as a conventional technique, a method of welding the discharge pipe and the lid by ultrasonic waves to reduce the number of parts requires equipment for welding the discharge pipe and the lid, and the reliability of the welded portion is not sufficient. Was.

[0005]

When the self-priming tube is integrated with the self-priming case, the water level of the priming water drops on the mold structure, so that the self-priming time is prolonged and the performance is reduced. Therefore, achieving a structure that raises the water level of the priming water and increases the amount of water with an inexpensive configuration is an issue.

Another problem is that the water seal at the lower end of the discharge pipe is reduced in number of parts without using screws or other tightening parts, and a conventional welding system is not required and is inexpensive. It is listed as.

[0007]

As a means for solving the above-mentioned problems, a self-priming pipe of another component is inserted from a discharge opening in a self-priming case so that it can be arranged at a predetermined position. Since the self-priming pipe can be positioned and water-sealed by fixing the discharge opening of the discharge pipe with the discharge pipe, the priming water level given as an issue becomes the position of the discharge pipe opening, and the priming water level rises, leading to an increase in water volume.

On the other hand, in the water seal structure of the lower end opening of the discharge pipe and the lid, the O-ring for water seal is inserted into the lower end opening, the lid is closed, and the discharge pipe is fixed to the base. Since the movement is restricted by being substantially in contact with the base, the base does not move, and the water seal can be achieved without using a screw.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view of a water passage portion of a pump device showing one embodiment, and FIG. 2 is a left side view of the pump device. FIG. 3 is a sectional view of the pump section and the self-priming case section of FIG.

1 and 3, the pump unit 1 has a casing 6 which is fixed via a motor 2 and accommodates an impeller 3 rotated by the motor 2 therein. A casing cover 7 having a discharge port 6b;
And covers the surface.

The pump section 1 shown in FIG. 1 has a suction pipe 10 having a suction flange 9 for connecting a water supply pipe for connecting a water source and a pump, and 4 is a check valve connected to the water suction pipe 10. The chamber contains a check valve 5.

Reference numeral 11 denotes a self-priming case having a steam-water separation chamber 11a fixed to the upper part of the casing 6, made of synthetic resin, and provided with a passage 11b connecting the check valve chamber 4 and the suction port 6a and a discharge port 6b. The connected opening 11c is provided.

Reference numeral 12 shown in FIGS. 1 and 6 denotes a self-priming tube, which is inserted from the discharge opening 11d of the self-priming case 11 and has a projection 11e provided in the self-priming case discharge opening 11d and a water pipe 12 flange notch 12a. Can be arranged at a specified position by inserting the same.

FIG. 10 is a cross-sectional view of the case where the self-priming case 11 and the self-priming tube 12 are integrated, and the height of the opening of the self-priming tube is X-. X
It becomes a line, and naturally the priming water amount also becomes the XX line position. On the other hand, as shown in FIG. 6, the water level becomes the YY line by using the self-priming tube 12 as the insertion method, the height water level of the arrow U1 rises from the XX line, and the priming water amount can be increased. .

Reference numeral 14 denotes a discharge pipe made of synthetic resin, whose upper part communicates with a discharge opening 11d in the self-priming case 11, and is fixed to the self-priming case 11, thereby positioning the water pipe 12 and priming. A water seal can also be used to prevent falling.

The discharge pipe 14 has a discharge flange 13 for connecting to a water supply pipe up to a faucet. Since the discharge pipe 14 is made of a synthetic resin, it is necessary to pull it out in three directions due to the restriction of the drawing direction due to the configuration of a mold. Therefore, there is an opening 14a at the lower end.

As means for closing the opening 14a, a water sealing O-ring 15 is inserted into the opening 14a, and a lid 16 is attached.

In this state, by fixing the lower part of the discharge pipe 14 to the base 8 for fixing the lower part of the motor 2 and the suction pipe 10, the lid is substantially contacted by the base, and the downward movement is performed on the surface of the base 8. And cannot move to the left and right because it is limited by the engagement with the discharge pipe 14, so that a sufficient tightening margin can be maintained without using a tightening screw, and the water seal can be reliably performed. .

A pump cover 17 for covering the pump unit 1 is mounted on the base 8.

In the above configuration, when the motor 2 is started after the casing 6 and the self-priming case 11 are filled with the priming water, the water in the casing 6 is discharged from the discharge port 6b by the action of the impeller 3 as shown by an arrow Q1. Then, it moves to the self-priming case 11. At this time, since the pressure in the casing 6 becomes negative, the check valve 5 is opened and the air in the water suction pipe 10 is removed from the casing 6.
Entrapped in the water inside, the self-priming case 11
Vomited. The water containing the air discharged to the self-priming case 11 is sent into the self-priming case 11 from the left side of the discharge port 6b as shown by Q1 in FIG. Then, the water that has entered the self-priming case 11 travels along the wall surface 11f as shown by an arrow Q2 in FIG. 1 and returns into the casing 6 from the right side of the discharge port 6b as shown by an arrow Q3. In this case, the air separated in the water / water separation chamber 11a passes through the self-priming pipe 12 and the discharge pipe 14
Sent to By the self-priming progressing by this action, the air existing at the lower part of the check valve 5 is discharged from the pump unit 1 to pump water.

In the case of self-priming, the priming water gradually passes through the self-priming pipe 12 and is discharged through the discharge pipe 14 to the outside of the machine. Therefore, when the priming water quantity is small, the water quantity is small before draining the air in the pumping pipe. Water-water separation cannot be performed, and pumping is impossible. Therefore, in order to make the priming water amount sufficient, the higher the position of the self-priming pipe opening, the more advantageous.

After the pumping, a water pressure corresponding to the pump discharge pressure is applied to the discharge pipe. Although the discharge pressure is also applied to the lid 16 shown in FIG. 1, since the movement is restricted by the surface of the base 8 and the discharge pipe 14, the tightness of the water sealing O-ring 15 is kept constant, and Can be sealed.

[0024]

As described above, according to the present invention, by inserting the self-priming tube into the self-priming case, the priming water level rises, the water amount can be increased, and the self-priming performance can be improved.

Further, according to the present invention, the movement of the lid can be restricted by closing the lower opening of the discharge pipe via the O-ring for water sealing and fixing the discharge pipe to the base, so that the number of parts can be reduced. Since the conventional welding is unnecessary, the reliability can be improved without capital investment.

[Brief description of the drawings]

FIG. 1 is a sectional view of a water passage portion of a pump device according to an embodiment of the present invention.

FIG. 2 is a side view of a pump device showing one embodiment of the present invention.

FIG. 3 is a sectional view of a pump section and a self-priming case section.

FIG. 4 is a sectional view of a water passage of a pump device showing one embodiment of the prior art.

FIG. 5 is a sectional view of a conventional self-priming case.

FIG. 6 is a sectional view of a self-priming case showing one embodiment of the present invention.

FIG. 7 is a view of a self-priming case discharge opening.

FIG. 8 is a sectional view showing one embodiment of a discharge pipe.

FIG. 9 is a sectional view of a discharge pipe showing one embodiment of the present invention.

FIG. 10 is a sectional view showing one embodiment of a self-priming case.

[Explanation of symbols]

1 ... pump, 2 ... motor, 3 ... impeller, 4 ... check valve chamber,
5 check valve, 6 casing, 7 casing cover,
8 ... Base, 9 ... Suction flange, 10 ... Suction pipe, 11 ...
Self-priming case, 12 self-priming tube, 13 discharge flange, 14
... discharge pipe, 15 ... O-ring for water seal, 16 ... lid, 17 ... pump cover.

Continuing from the front page (72) Inventor Shigetomo Yoshihara 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Taga Headquarters, Hitachi, Ltd.Electrical Equipment Division

Claims (2)

[Claims] A priming water is introduced into a water passage upstream of a check valve and into a self-priming case, an impeller arranged in a casing is driven by a motor, and a water passage and a suction pipe (not shown) downstream from the check valve are provided. A self-priming pump device that discharges air and performs a pumping operation. The material of the self-priming case, the suction pipe and the discharge pipe is made of synthetic resin, and the self-priming pipe is inserted from the discharge opening in the self-priming case. And a discharge pipe fixed to the discharge opening. 2. The discharge pipe according to claim 1, wherein the discharge pipe is provided with openings at three places, a discharge opening, a discharge flange fixing part, and a lower end of the self-priming case, and the lower end is water-sealed. A pump device, wherein an opening is closed by an O-ring and a lid for use, and the lid is substantially in contact with a base.